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M Hasan, Teacher
Category: Homework
Satisfied Customers: 1849
Experience:  BA (Hons) in Mathematics from Oxford University
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# #12. Spruce-Pine-Fir lumber weighs 26 lb/ft3. What is the

### Resolved Question:

#12. Spruce-Pine-Fir lumber weighs 26 lb/ft3. What is the weight in pounds per lineal foot of a 6” x 10” (actual dimensions: 5½” x 9½”) timber beam? What is the weight of the beam in kN/m and the mass in kg/m?
Submitted: 4 years ago.
Category: Homework
Expert:  M Hasan replied 4 years ago.
Hi there!

Weight in pounds per lineal foot = weight per cubic foot x dimension
Weight in pounds per lineal foot = 26 x 6 x 10
Weight in pounds per lineal foot = 1560 lb/ft

Weight of the beam in kN/m:

1 lb/ft = 0.01459 kN/m
1560 lb/ft = 22.8 kN/m

Weight of the beam in kg/m:

1 kN/m = 101.9 kg/m
22.8 kN/m = 2324.2 kg/m

Hope this helps. If so, please click 'Accept'. Thanks! :)
Customer: replied 4 years ago.
Spruce-Pine-Fir lumber weighs 26 lb/ft3. What is the weight in pounds per lineal foot of a 10"x10" (actual dimensions: 9 1/2" x 9 1/2") timber colum? What is the weight of the column in kN/m and the mass in kg/m?
Expert:  M Hasan replied 4 years ago.
Weight in pounds per lineal foot = weight per cubic foot x dimension
Weight in pounds per lineal foot = 26 x 10 x 10
Weight in pounds per lineal foot = 2600 lb/ft

Weight of the beam in kN/m:

1 lb/ft = 0.01459 kN/m
2600 lb/ft = 37.93 kN/m

Weight of the beam in kg/m:

1 kN/m = 101.9 kg/m
37.93 kN/m = 3865.1 kg/m

Hope this helps. If so, please click 'Accept'. Thanks! :)
Customer: replied 4 years ago.
where are you getting 0.01459 kN/m from
Expert:  M Hasan replied 4 years ago.
Hi there!

1 lb = 0.004448 kN

and

1 ft = 0.3048 m

1 lb/ft = (1 lb)/(1 ft) = 0.004448/0.3048 = 0.01459 kN/m

Hope this helps. If so, please click 'Accept'. Thanks! :)
Customer: replied 4 years ago.
and where are you getting 101.9 kg/m
Expert:  M Hasan replied 4 years ago.

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M Hasan, Teacher
Category: Homework
Satisfied Customers: 1849
Experience: BA (Hons) in Mathematics from Oxford University

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